认知分心时驾驶人应激反应特征分析

Analysis of stress response characteristics of driver with cognitive distraction

为预防由认知分心影响驾驶人应激反应能力引发的交通事故,开展试验,在驾驶模拟器平台上模拟城市、乡镇、山区和高速公路等应激场景,测试有无分心任务2种条件下驾驶人的应激反应,采集驾驶人操作数据和车辆行驶数据,并利用Facelab5型眼动仪记录驾驶人眼动数据;选取相关表征指标并分析试验数据。结果表明：相比于正常驾驶,认知分心驾驶导致驾驶人视觉搜索范围变窄;无论正常驾驶还是认知分心驾驶,扫视行为均以中、低幅度为主;认知分心导致驾驶人对加速踏板的控制能力减弱;与正常驾驶相比,认知分心时驾驶人的应激反应时间明显增加。

For the sake of preventing traffic accidents cognitive distraction may caused experimental trials were carried out to test the drivers ＇ stress response under the two conditions： normal and cognitive distraction driving conditions. A driving simulator platform was used to simulate various stress scenarios such as city,town,mountainous area and highway,and collect driver operating data and vehicle driving data. A Facelab5 eye tracker was used to record the driver ＇ s eye movement data. The related characterization indicators were selected. And the experimental data was analyzed. The results show that compared with normal driving,cognitive distraction driving leads to a narrower visual search range for drivers. For both normal driving and cognitive distracting driving,the scanning scope is mainly medium and low. Cognitive distraction weakens the driver ＇ s ability to control the accelerator pedal. Compared to normal driving,cognition distraction increases significantly the driver＇s stress response time.